CVE-2026-40079

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 1.7%, top 25% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 9.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior are vulnerable to Command Injection due to lack of sanitization in the escape_command() function. The escape_command() function at lib/rrd.php is a no-op: it returns $command unchanged. The command line built by rrdtool_function_graph() is passed through this function and then to shell_exec($full_commandline). The risk is in __rrd_execute() where text_format values from graph templates (which may contain host variable substitutions) reach shell_exec without adequate escaping. This issue has been addressed in version 1.2.31.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation2% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
76%
KEV
Not listed

Published

June 25, 2026

Last Modified

June 26, 2026

Advisory Details (2)

Auto-updated Sep 6, 2026
Patch available. Sources: github, github_commit.
github Patch Available

Command Injection via escape_command() no-op in RRDtool execution · Advisory · Cacti/cacti · GitHub

https://github.com/Cacti/cacti/security/advisories/GHSA-xq98-376r-hv9j
github_commit Patch Available

commit 4c09efaebf3a (Cacti/cacti)

Patch available: Cacti/cacti release/1.2.31 (contains commit 4c09efaebf3a)

https://github.com/Cacti/cacti/commit/4c09efaebf3a9faec66969d0b5c4aceaf397f37f

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
cacti1.2.16+ds1-2 ... 1.2.31+ds1-2 (31 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
cacti1.2.24+ds1-1 ... 1.2.31+ds1-2 (20 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
cacti1.2.30+ds1-1, 1.2.30+ds1-2, 1.2.30+ds1-3, 1.2.31+ds1-1, 1.2.31+ds1-2——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
cacti1.2.30+ds1-1, 1.2.30+ds1-2, 1.2.30+ds1-31.2.31+ds1-1—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 38× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 115 total refreshes for this CVE.

  1. 2026-09-11 14:53 UTCEPSS rescore
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  1. 2026-08-19 17:03 UTCEPSS rescore
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  75. 2026-07-06 02:23 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-40079?
CVE-2026-40079 is a critical vulnerability published on June 25, 2026. Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior are vulnerable to Command Injection due to lack of sanitization in the escapecommand() function. The escapecommand() function at lib/rrd.php is a no-op: it returns $command unchanged. The command line…
When was CVE-2026-40079 disclosed?
CVE-2026-40079 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-40079 actively exploited?
CVE-2026-40079 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 24.3% of all scored CVEs.
What is the CVSS score of CVE-2026-40079?
CVE-2026-40079 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-40079?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-40079, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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